Means for lifting fluids from wells



June 10, 1941. NIXON 2,245,003 MEANS FOR LIFTING FLUIDS FROM -WELLS Filed Feb. 3, 1940 i3 Sheets-Sheet 1 J Jeac/yZZ/V/xar/ I my June 10, 1941. J. D. NIXON 2,245,003

MEANS FQR LIFTING FLUIDS FROM WELLS I 15 Sheets-Sheet 2 Filed Feb. 3, 1940 June 10, 1941. J, D, WON I 2,245,003

MEANS FOR LIFTING FLUIDS FROMWELLS Filed Feb. 5, 1940 13 Sheets-Sheet 5 Filed Feb. 3, 1940 13 Sheets-Sheet 4 5 awe/whom June 10, 1941. J, D. NIXON I MEANS FOR" LIFTINQ FLUID WELLS Filed Feb. 3, 1940 13 Sheets-Sheet 5 rlmm IHHHIHHIIH IIIIHIIIIIHHM! I IIIHlllllllllllHIIIIIUIIHHIIHH HIIIIIHIIIHIIHIHIH mmm 1HINIIHIIIIIIIJIIIIIIIII m June 10, 1941. N XON 2,245,003

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15 Sheets-Sheet 8 June 10, 1941.

MEANS FOR LIFTING FLUIDS FROM WELLS J. D. NIXON 2,245,003.

Filed Feb. 3, 1940 13 Sheets-Sheet 9 J; D. NIXON MEANS FOR LIFTING FLUIDS FROM WELLS Filed Feb. 3, 1940 13 Sheets-Sheet 10 'JeooyD. Nixon June 10, 1941.

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MEANS FOR LIFTING FLUIDS FROM WELLS Filed Feb. 3, 1940 l3 Sheets-Sheet l1 Jead ll Nixon June 10, 1941. J, D. NIXON 2,245,003

' MEANS FOR LIFTING ELUIfiS FROM WELLS I Filed Fe b. s, 1940 1s Sheets-Sheet 12 Patented June 10, 1941 mans roa ur'rnvo FLUIDS mom warms Jeddy D. Nixon, Houston, Tex, ass gnor of onelialf to Wilson Supply Company, Houston, Tex., a corporation of Texas ApplicationFebruai-y 3, 1940, Serial No. 317,073

3 Claims. (Cl. 103232) This invention relates to new and useful improvements in means for lifting fluids from wells.

One object of the invention is to provide certain improvements in well fluid lifting systems and apparatuses and particularly upon my Patents No. 2,164,469, No. 2,171,478, No. 2,171,479, No. 2,171,480, No. 2,171,812, and Reissue Patent No. 21,199; and my co-pending applications, Serial No. 239,348, flled November 7, 1938; Serial No. 286,683, filed July 26, 1939; and Serial No. 304,684, flied November 16, 1939.

Another object of the invention is to provide improved means for controlling the admission of a lifting fluid under pressure to a well pipe to lift the well fluid therein; whether the source of lifting fluid is from the well proper or from a supply Outside of the well. I

A further object of the invention is to provide an improved system of controlling the lifting of the well fluid from the producing level to the sur-' face which consists in, a supply of pressure fluid,

, means for conducting a portion of the pressure fluid to the well fluid to lift the same, means operated from the surface for controlling the point of introduction of said conducted portion of pressure fluid to said well fluid, and means on the surface for regulating the operation of the control means for controlling the introduction of the conducted portion of pressure fluid to said well fluid.

An important object of the invention is to provide an improved device so arranged that all of the control mechanism on the surface is unitizedandmaybemountedonskidssoastobe rea dily transportable and to make for ease in installing on location.

Still another object of the invention is to provide an improved surface actuating assembly including an improved mast and wherein the.

, various instrumentalities may be grouped as a unit, thus making a compact arrangement which may be vreadily assembled.

Still another object of the invention is to provide an improved device for vuse with said invention which. is so constructed as to extract and trap all foreign matter from the pressure fluid used in all of the control mounted on the surface of the well, whereby the clogging or interference with the actuation of said mechanism is prevented. v a

Still another object of the invention is-to provide a. pressure fluid-driven hoist for the line. I used in said well which is compact and relatively light so as to be easily portableand which is so arranged that all of the operating controls'there for are within easy reach of an operator, wherer by the positive control of said line is had at all times. A construction designed to carry out the invention will be hereinafter described, together with other features and objects of the invention.

The invention will bemore readily understood from the following specification and by reference to the accompanying drawings, in which an example of the invention is shown, and wherein:

Figure 1 is a side elevation 'of the aboveground structure, constructed in accordance with the invention and having one of the skid members of the unitized base removed;

Figure 2 is an end view taken at right angles to Figure 1; i

Figure 3 isa plan view of the above-ground structure;

Figure 4 is a view partly in section and partly in elevation of the intermittent control mechanism and its housin Figure 5 is a longitudinal, cross-sectional view of a portion of the operating mechanism of the intermittent control mechanism;

Figure 6 is a view partly in section and partly in elevation of the regulator valve of said mechanis'm;

Figure 7 is a detail view of the time-controlled valve for regulating the actuation of ,said mechanism Figure 8 is a plan view of said regulator valve; Figure 9 is a view partly in section and partly in elevation of the actuating cylinder of said invention;

Figure 10 is a view partly in section and partly in elevation of a strainer used with said invention;

taken on line |l--l| of Figure 9;

Figure 12 is an isometric view of oneof the packing rings used in the lower end of said op-' crating cylinder;

Figure 13 is a longitudinal sectionalview of a' valve constructed to prevent the accumulation of formation or free well gas in said casing below said packer; I

Figure 14 is a horizontal, cross-sectional view Figure 11 is a h'orizontal, cross-sectional view Figure 17 is a similar view showing the lower portion of a well and is a continuation of Figure 16;

Figure 18 is a view partly in section and partly in elevation of the upper portion of the operating or producing valve in its opened position;

Figure 19 is a similar view showing the lower portion of said valve and is a continuation of Figure 1a;

Figure 20 is a longitudinal, sectional view of a portion of said valve showing it in its closed position; v

Figure 21 is a horizontal, cross-sectional view taken on the line 2i-2l of Figure 19, showing said valve in its open position;

Figure 22 is a similar view taken on the line 22-22 of Figure 20, showing said valve in its closed position; I

Figure 23 is an enlarged view, partly in section and partly in elevation, of one form of a wire line stufling box which may be used on the upper end of said tubing;

Figure 24 is a horizontal, cross-sectional view taken on the line 24-24 of Figure 23;

Figure 25 is a similar view taken on the line 25-25 of Figure 23;

Figure 26 is a horizontal, cross-sectional view taken on the line 26-26 of Figure 23;

Figure 2'7 is a longitudinal sectional view of one form of a standing valve that may be used at the foot of the well tubing;

Figure 28 is a horizontal, cross-sectional view taken on the line 28-28 of Figure 27;

Figure 29 is a similar view taken on the line 29-28 of Figure 27; l

Figure 30 is a horizontal, cross-sectional view taken on the line 30-38 of Figure 27 Figure 31 is a view partly in section and partly in elevation of one means ,of attaching the operating bar to the operating line;

Figure 32 is a horizontal, cross-sectional view taken on the. line 32-42 of Figure 31;

Figure 33 :is a detailed view, partly in section and partly in elevation, of an injector or lubri-, cator whichmaybe used with the invention to introducea-chemical or fluid into the well fluid flow line;a J

Figure 34 is taken on the line 34-34 of Figure 33;

Figure 35 is a similar view taken on the line 35-35 of Figure 33; and

Figure 36 is a horizontal, cross-sectional view taken on the line 36-36 of Figure 33.

the drawings, the numeral 40 designates the usual well'casing (Figures 1, 15; 16, 17 and 18) which has a well tubing string 4| depending axial- 'ly *therethrough. The upper end of "the casing I is screwedinto the usual casing head 42, mounted above the ground -'lev' r :l, and the upper end 'of the "t binc' i ief js rp d Wit t casing hea "inthergular manner. "All-6f the above ground structure may ,be substantially the-same as that set forth in'myabove-inentijoned patentsand copend applications; but I; prefer to the arr nsq e t n st '(Figures.1 2, 3fand 15),

" A Suitable platform or base 43" is' mounted on skids .44, preferably being constructed of tubing or' p p A suitable stub derrick ormast' 45 is ,mounted onlthe skids 44 and spaced; from said v bracing may be of any suitable material and cona, horizontal, cross-sectional view tures shown in thgi i'awmss struction desired. It will be noticed in Figures 1, 2 and 3, that said platform, skids and derrick are provided for supportingand carrying the above-ground equipment used with this invention, as will be more fully hereinafter set forth.

The platform 43 forms a support for a hoist $6 to be mounted thereon and preferably attached thereto in any suitable manner. The framework or supportof this hoist consists of side or end plates 41 and 41' mounted upon skids or foot pieces 48' which are upturned in the usual manner on each end. These side plates are held together in a spaced relation by elongated bolts 49 having reduced threaded pins on their outer ends and nuts 58 are screwed thereon to clamp said side plates to said bolts. 0n the upper edge of said plates 41 and 41', a suitable cross bar 5| is attached for supporting an upright pipe or support 52 by a flanged collar 52' being threaded onto the lower end of said pipe. The upper end of said pipe engages within a suitable bracket 53 mounted onthe back and near the lower edge of 54. This housing comprises a water-tight, dust-proof enclosure for the inter mittent control mechanism. This mechanism a suitable housing controls'the flow of a pressure fluid to a suitable operating mechanism which will be more fully hereinafter described.

This pressure fluid is supplied to the well and said controlling mechanism in said housing 54 by a suitable field line 55 which terminates in 'a-'l' 56. 'A pipe 51 is connected to one leg of said T and leads to one of the outlet openings of said casing head 42, so that said pressure fluid will be introduced into said well casing 40 outside of said The other leg of said T 56' is connected toa strainer housing 58 (Figures 1, 2 and 10) by a short nipple 59. This housing contains an enlarged chamber and-is provided externally with an annular-flange 6|, An annular, concave-convex cap or head 52 abuts the open end of said housing and this cap is also provided with'an annular flange 63 corresponding to the flange 8|. The flanges 6| and 53 are held together-by bolts 64 and nuts and clamped between said flanges is a gasket 68 of rubber, rubber'compound, or any s'uitabiematerial. Attention is called to Figure 10, in which it will be seen that a circular fllterscreen or disk 51 is clamped between said gasket ring 55 and said cap 62,.so thatv the outer edge qr perimeter of said disk terminatesshort of said bolts- 64, whereby said pressure fluid entering said housing 58 through said nipple'58,'* has to pass through said filter screen 81, into said cap 52 'and' out through said pipe I. to a TIaw uitabIe pet cock 68' is connected" to saidchainber M te-drain the samer" l i and other it:

i 9f. amide; n a'manually' operated," throttle v therein, in order to control the 'iof, pressure fluid said lates the'speed 'and'therunning off'said turbine platform 48 (Figures 1 and 3). 'This stub'derwithin said housing 1:, asfwill' be more. may hereinafterwards described." I

will be seen in 'Figure'4, an" elongate, rectangular body 14 is mounted in the lower portion of said housing 54 and is suitably fastened to said housing by one or more stud bolts 15 engagsaid bolts I5. The purpose, function and operation of the intermittent control mechanism positioned within said housing 54 and mounted upon and within said body 14 is very similar to the intermittent control mechanism shown in my Patent No. 2,171,478, and while the mechanism shown in this patent may beused just as satisfactorily with this invention, in some instances on certain type of wells, I prefer to use the structure shown and described for Figures 4, 5, 6, 7 and 8.

The pressure fluid supply pipe 10 is threadably connected into the lower end of a vertical port or passageway 18 extending transversely through said body 14 from its lower edge to its upper edge. This port I8 is connected to one end of an elongate, horizontally extending passageway 19 lying longitudinally of said body I4 and which terminates in a vertical port or passageway 80, similar to said port 18. This port 80 extends from the upper edge of said body 14 to the bottom of said passageway 19, but does not extend therebelow as does said port 18. One end of an elongated, horizontally extending passageway 8|, similar to the passageway I9, is connected to-said vertical port 80 intermediate its ends and above where said passageway 19 terminates in said port 80, so that said port extends transversely of said passageways I9 and 8| and forms a communication therebetween. The other end of said passageway 8| terminates-in a vertical, transverse port or passageway 82, similar'to said port I8.

The lower edge of said vertical port- 82 has a a stub derrick 45 and the other end or said rope,

being secured 'to an upright-ear 81 formed on the upper end of a cap 88 threadably mounted on the upper end of said cylinder 84. usual drilling derrick (not shown) is used or another type of stub derrick, said cylinder and rope 85 maybe suspended from' the usual crown block of said derricks, or in any other manner desired. The cap 88 is provided with a small, vent plug or bolt 89 threaded thereinto on its upper end ad- .jacent said ear 8'! and this plug is formed with an axial opening therethrough for providing the usual air vent for said cap and the upper portion of said cylinder 84 (Figure 9).

The lower end of said cylinder is closed by'an elongated, annular body or head 90 and it will be seen in Figure 9, that said pipe 83 extending from said port 82 of said valve body member 14 within said housing 54 is threaldably connected into said body 90. The annular space within said body 90 is divided into two separate chambers by a transverse, horizontal partition 9|, wherebya chamber 92 is formed therebelow for containing a suitable lubricant, such'as lubricating oil; A

filler port and passageway 93 is provided for said chamber, preferably terminating adjacent the lower edge of said partition 9| and extending diagonally upwardly to make for ease in filling said chamber 92 with said lubricant. A plug or cap 94 is of course provided for the passageway 93, in order to prevent dirt and extraneous If the chamber 82 will be held there and matter from entering said chamber. The lower end of said body is formed with a depending, annular-nipple or skirt 95 which is externally screw-threaded, so as to receive an internally screw-threaded thimbie or cap 96. I

It is pointed out in Figure 9, that the partition 9i and the bottom of said cap 90 are provided with co-axial openings 9| and 92' respectively, and that said nipple 95 is formed with a packing chamber which is co-axial with said openings 9| and 92', in order that an elongate, hexagonal piston rod 91 may depend axially from within said cylinder 84 and through said cap 90 and out from said thimbie 96. In loading the packing chamber of said nipple 95, a suitable washer or junk ring 98 is first placed around said rod 91 and then slid within said nipple, which is followed by a plurality of suitable split packing rings 99 having co-axial, hexagonal openings or bores therethrough. The usual follower block I00 bears against the outermost ring in the regular manner for compressing said packing rings into a tight, sliding engagement with said pis-.' ton rod 91.' Thus, when said packing has been tightened as explained, the lubricant in the prevented from escaping down said rod 91.

The upper end of said piston rod is provided with a suitable piston IOI having the usual sealing and packing rings or cups I02 mounted thereon. The lower end of said piston rod is clamped thereto by a clamping block or member I04 held to said clamp by bolts I05 and nuts I05. This block I04 may be similarly grooved the same as said clamp I03, as has been fully and completelyset forth in my above-mentioned patents and co-pending applications. It is pointed out that whenever said piston rod 91, piston IN and clamp I03 are moved and the wire line 220 is fastened in said clamp, said wire line will be moved-with said piston rod 91.

In Figures 4 and 5, it will be. seen that said said valve body member 14 in the lower end of, said housing 54, has screwed into its upper side three pairs of upright, externally screw-threaded stud bolts or posts I08, I08; I09, I09; and H0, H0. The threaded bolts comprising each pair of posts are spaced equidistant from. their re spective vertical ports 18, 80 and 82; such as said posts I08 and I08 from said port 10, said posts I09 and I09 from said port 80, and said b'olts no and 0' from said port 02. All of said posts are secured to said body member by a lock or retaining nut I I I on the foot of each post being tightened 0n.the external threads of said posts against the upper surface of said body. Each pair of posts and the respective p'ort therewith (Figures 4, 5 and .6) constitute a separate valve in function andpurpose, and while all three are similar in construction, I will describe only The lower portion of one valve in detail (Figure 6), which description my other form of intermitters, such as my Patent No. 2,171,812 and Patent No. 2,171,478, and my co-pending application, Serial No. 239,348.

. This structure consists of a'concavo-convex, annular cap or head 'I I4 having an'outwardly'directed flange II5 on its perimeter. The annular piston chamber or cylinder H8 has a similar flange H1 and these two flanges H5 and H1 are clamped together by a plurality of bolts IIS and nuts I for gripping and clamping a diaphragm disk 8 therebetween; It is pointed out that a diaphragm actuating chamber 4' is formed above said diaphragm within said cap H4. The diaphragm is provided with an axial opening so that the upper end of a piston rod I2I may extend therethrough, in order that said diaphragm and a flat, circular piston I22 may be securely connected together by a-nut I23 engaging said threaded upper end of said piston rod on the upper side of said diaphragm; whereby said diaphragm II8, said piston I22 and said piston rod I2I are tied together and moved as a unitary structure.

It will be noticed in FigureG, that intermediate the ends of said threaded bolts I08 and I08, an adjusting nut I24 is mounted on each bolt and these nuts support an oblong web I25, whereby upon the rotation of said nuts I24, said web may be raised or lowered as desired. A suitable coil spring I28 is interposed between and bears against the upper surface of said web I25 and the lower surface of the piston I22, whereby an upward tension or thrust is placed or exerted upon said piston I22, said piston rod I2I and said diaphragm I I8. Thus, it will be seen that by adjusting said nuts I24, this tension is regulated and maybe increased or decreased as is needed.

The lower end of said piston rod I2I depends within said vertical port 18 and a suitable stufflng box is provided for closing the upper end' of said port 18 and packing around the lower end of said piston rod I2I. This stufling box may comprise a threaded nipple I21 having an axial opening I28 therethrough, the upper portion of which is counterbored to provide a packing area or chamber for a suitable packing I29.v The usual follower block I30 rides upon the packing I29 and is engaged and actuated by a threaded cap I3I screwed upon the upper end of said nipple I21.

It will be seen in Figures 7 and 8 that said piston rod I2I isprovided with an axial bore or passageway I32 extending entirely therethrough, so that fluid may flow through said piston rod from one end to the other. The lower portion of said bore I32 is counterbored at I33 so as to provide an entrance or'admission chamber. A small, annular dart or foot piece I34 is positioned atthe lower .end of-said piston rod and has a tension of said spring I31, aswellaslifting said conical valve' tip or face I 35'on its lowerend and an upstandingpishort cylindrical pin- 2 on its up- "per side; pin has a loose 'flt within sai'd "counterbore" I33 and thesuppjer end-:of said *pin abuts-s the lcwer edge'eof a smallccoilwspring' I 31 w'vhiclr exerts a slight tension downwardly on said darts: A- small hiole 'or opening 1384s providedin the wall of said piston 'rod adjacent the lower end ing therethrough and the upper end of said port is formed with a ground, tapered seat I38 to receive the conical valve face tip or member I35.

piston rod I2I. Then said pressurefiuid will enter said counterbore I33 both through said hole I38 and around said pin of-said dart I34, flowing through said bore I32 of said piston rod and out the upper end thereof on top of saiddiaphragm 8. While said spring I28 tends to keep said port I open, the fllling up of said chamber 4' in said cap H4 and a pipe I42 leading therefrom to clock valve D will build up a pressure on said diaphragm which, is of suflicient area, whereby said piston rod will be moved downwardly onto its seat I36 to close said port I, at whatever pressure it is desired to maintain inthe cap II4. Of course, the same pressure present in said pipe I42, cap II4, bore I32, port 18 above said partition I30 will also be present in said longitudinal passageway 18 up to the lower end of said vertical port 80.

The valve A is termed and serves the purpose of a regulator valve, because the pressure in said pipe 10 is always greater than that used and desired for operating said actuating mechanism, whereby said pressure fluid. is 'reduced at this point to the pressure desired and a reserve of this pressure fluid is maintained. Upon any withdrawal, this reserve is replenished by a reduction of the pressure in said chamber II4, upon said diaphragm II8, so that said spring I26 will lift said stem I2I and open said port I4 I. It will be seen that said pipe I42, cap I I4, bore I32 and port 18 above said partition I39 and longitudinal passageway 18 are all in communication and form a pressure fluid reservoir; so that upon withdrawal of pressure fluid from said pipe I42 01' said passageway 19, the pressure within said chamber I I4 of said cap II4 will also be reduced simultaneously, whereby said spring I28 lifts said piston I22, 'said piston rod I2I and said valve face I35 from said seat I36 for admitting more pressure I a motor orgate valve, as it controls the flow of pressure fluid from said passageway 19. through said port into said passagewayv 8|. Itj will'be seen that-the structure of valve 13 is very similar to valve A with the :exception that the :stemwI2l' solid and has a reduced-portion:442'on'its lower end which terminates-in an enlarged foot or valve t mem r 1.35" "The action-rot; valve Biisaalsoi Editqferentgim that the port ;I-.4 I larger-"in diameter than said port; [41; andis :opened upon the downstroke of --,said pistonjrod i I 2 rand-(closed upon'athe upstrokeortravehofsaidpistomi'odL 11* The valve. 0 is termed: and serves: the purpose of arelease or control.-valve':*and this valve'and port'02 are similarto said valve Aand port 18 in structure-and actionwith the exception that the p 2,245,003 port I upon the downward travel of said piston rod I45 and opens the same upon its'upward travel. The upward and downward travel of' said piston rod is caused by the accumulation of pressure fluid in the cap I 11 acting upon the diaphragm I18 against the tensionof said spring I19. When said piston rod I45 is in its upper position as shown in Figure 5, any fluid in said passageway 8| or said pipe 83 will flow through said port I, into the passageway I44, then into the passageway I41, from which it is led into a "short length of pipe I48 where it is vented to the atmosphere. Whenever said valve B is opened, said valve C will be closed, that is said piston rod I45 will be in its lower position and pressure fluid from said passageway 19 entering said passageway 8! will flow into said pipe 83 through which it will be led to the lower end of said'cylinder 84 beneath said piston IIlI, whereby said piston will be lifted or forced to the upper end of said cylinder 84 When said valve B has closed and said valve C is'opened, said port I is opened so that the pressure fluid in the passageway 8|, said pipe 83 and said cylinder 84 beneath said piston I III will bleed through said port I and said passageways I44 and I41 and out of said pipe I48 to the atmosphere, whereby said piston IIII is free to return to the lower end of said cylinder 84.

As has been pointed out, a more or less constant pressure is supplied to said pipe 18 through said strainer 58 from said field line 55 which is connected to a suitable source (not shown). The spring I26 of said regulator valve A is setso as to maintain a predetermined pressure within said channel or passageway 19, said port 18, said bore I32, said counterbore I33 of saidvalve stem I2I, and said chamber 4' within said cap II4. This same pressure will be present in said T I58 connected to said cap I I 4, as well as in said pipe I42 leading from said T (Figures 4, 5, 6 and 7) to a, clock or time operated valve D.

This valve D is preferably composed of a rectangular block or valve body II having a vertical bore I52therein. This bore extends downward from the top of said block to the bottom thereof and is threaded at each end for receiving a thimble I53 at its upper end and a thimble I54 at its lower end. The thimble I54 connects with said pipe I 42 and has an axial bore I55 therethrough,

the upper end of which bore is threaded to receive a removable valve seat I56. A laterally directed opening or passageway I51 extends outwardly from said bore I52, intermediate the threaded portions of said bore and preferably just above said removable seat I56. The outer end of said opening I51 is threaded to receive a thimble I58 having an axial bore therethrough for connecting apipe I59 to said opening. Thus, it will be seen that a passageway from said pipe I42 to said pipe I59 is provided through said valve body I5I.

The thimble I63 at the upper end of said bore I52 is provided with an axial bore I60, the lower portion of which is counterbored at I6I and a small, cylindrical valve I62 is positioned within said counterbore I6I'. The lower end of the valve I62 is pointed, so as to engage and seat upon said removable valve seat I56 for closing the passageway through said valve body I5I, whereby the flow of fluid from said pipe I 42 to said pipe I59 through said valve body may be controlled. It is pointed out that this valve member I62 may undergo a limited sliding movement within th counterbore I6I.

A thinvalve rod or stem I63 extends downand which spacing to some extent facilitates wardly through'the bore I 68 of said thimble I53 and the lower end of said valve stem rests upon the upper end of said valve member I62, but has no fixed connection therewith. Manifestly, when said valve stem is moved downwardly, its lower end engaging the upper end of said valve member will move said valve member downwardly, so that the conical point on its lower end engages in the removable seat I56 and closes said passageway through said valve body I5I. So long as the stem I63 is held in its lowermost position, it will hold said valve member in a seated position which positively prevents a flow of fluid from said pipe I42 to said pipe I59. However, when the pressure on the upper end of said valve stem is released or removed, the pressure of said fluid in saidpipe I42 and said bore I of said thimble I54 acting against the underside of said valve member I62 will move said member and said valve stem upwardly in said counterbore I6I and said bore I68 respectively. It is pointed out that the upward movement of said valve member will be limited by the upper end of said end contacting the underside of a knurled head of an adjustable stop bolt I64, but has no fixed connection therewith. This bolt is threaded into the underside of a lever I65, which lever has one end curved downwardly and pivoted to said valve body I5l, so that said lever extends upwardly from one corner of said valve body and overhangs the same. In Figure 7, it will be seen that due to its pivotal mounting said lever I65 tends to swing downwardly at all times and is supported only by said valve stem I63, whereby the weight of said lever is imposed upon said valve stem and said valve member I62 to hold said member in its seated position. In order for said valve member to raise said lever I65, the pressure of the fluid below said valve member must be sufiicient to lift said lever and its attachments; although, it is 'true that said valve member and said stem exert the lifting action of the pressure fluid at a spaced point from the pivot point of said lever lifting of said lever.

An operating .crank or finger I66 is pivoted at one end to an ear or lug I61 depending from the underside of said lever I65. The outer end of said finger I66 is upturned and slotted to form a bifurcated yoke in which a small roller I68'is so mounted that it is free to revolve therein. It will be seen in Figures'4 and 7, that the roller I68 rides on the periphery of a suitable escapement or revolvable wheel I69, that has one or more notches I10 out or formed in its periphery. This escapement wheel is mounted on a shaft I1I extending from a suitable housing I12 containing a time or clock mechanism (not shown) for driving said shaft I1I andsaid wheel I69. This wheel I69 revolves in a counter-clockwise direction (Figures 4 and 7) and said roller I68 rides on the periphery o'fsaid wheel, so that when said wheel has revolved and a notch I18 has come over said roller I68, said roller is free to enter said notch, as will be described later.

The outer end of said lever I65 is provided with a depending bolt or pin I13 which extends the a lifting action on said finger and the tension of said spring I15 may be regulated by said knurled nut I14, whereby said flnger I66 and said lever I65 are so connected together as to co-act and form a flexible connection from the roller I68 to the upper end of said valve stem I63. The flexibility or rigidity of this connection, thus formed, may be regulated by the tension placed on said spring I15 by said knurled nut I14, thereby, when one of the notches I10 is above said roller I68, said pressure fluid beneath said valve member I62 will lift said valve member, said stem I63, said lever I65, said finger I66 and said roller; until said roller engages the bottom of said notch, which terminates the upward movement or travel thereof.

It is pointed out that said valve C is actuated at a lower pressure than said valve B is actuated .(Figure so that when the valve I62 is opened, the pressure fluid from said pipe I59 entering said caps I11 and I8I will move said piston rod I45 downwardly to closesaid port 4 before said piston rod I2I' is moved downwardly to open said port I H. The pressure fluid from said passageway 19 may now flow through said passageway 8I and into said pipe 83. The clock valve D regulates the entire actuation of said valves B and C which makes them completely time operated valves. The regulating mechanism of said clock valve D is the knurled bolt I64 and its lock nut I64 threaded through said lever The finger I66 has a short, upstanding lug 400 on its upper surface near said pin I13 and spaced from said lug I61 for engaging the undersurface of said lever I65. Attention is directed to Figure '1, wherein it will be seen that there is a small space between the upper end of said lug 400 and the underside of said lever. The amount of space between said lug and said lever is regulated by said bolt I64 and this space, together with the adjustment of said bolt I64, control the length of time said valve I62 remains open, as well as the length of time said valves B and C are actuated and then released. Whenever the adjustments of said regulator valve A are changed, so that a greater or lesser pressure is carried in said passageway 19, said bore I32, said chamber 4' and said pipe I42, said bolt I14 and said spring I15 have to be adjusted in accordance to regulate .the tension of said roller I68 on said wheel I69. This bolt I14'and spring I15 take care of any slight inaccuracies or irregularities in said wheel I69, in said shaft I 1 I, or in the timing mechanign (not shown) driving said shaft.

The adjustment of said bolt I64 and the amount of space between said lug 400 and said lever I65 control the depth to which said roller I68 enters said notch I in said timing 'or escapement wheel I69 before said lug engages said lever to lift the same. As soon as said lug engages said lever, the pressure fluid beneath said valve I62 will lift said valve, said lever and said roller, whereby the pressure fluid will flo-v through said pipe I59 to-said release valve C and said motor valve B. When said roller has entered said notch to the point where said lug 400 engages said lever l65, the opening of said valve I62 begins and this valve will remain open while said roller completes its entrance into sa d notch un il the bottom of said notch is reached. Due to the revolving of said wheel I69, said roller will ride on the inclined side of said notch and be carried up and out of said notch. As soon as said roller reaches the point where said lug 400 engaged said lever I and said valve I62 was opened, said valve I62 will be closed and said lug will drop away from said lever.. If said roller is not out of said notch when this point is reached, said roller will continue riding up the inclined surface of said notch until it reaches the periphery of said wheel. I

The valves B and C are actuated to move their respective piston rods downwardly when said valve I62 is opened and are held in this position as long as said valve I62 is open. Thus, by regulating the length of time said valve I62 is open. the opening and closing of said valves B and C will be controlled. The length of time said valve I62 is open depends on the depth that said roller enters said notch before said valve is opened,

because said valve is closed when said roller reaches the same depth at which it opened said valve. Byadjusting said bolt I64 to increase or decrease the space between said lug 400 and said lever I65, the depth to which said roller enters said notch is easily regulated and the length of time-said piston rods I 2| and I45 of said motorvalve B and said release valve C respectively are held in their lowermost positions.

When said valve I62 has been closed, the pressure fluid trapped in said caps I11 and I18, said pipe I80, said T I 16 and said'pipe I59 will leak or bleed around said valve stem I63 and through said bore I60 and escape to the atmosphere. This bleeding will permit said piston rods I2I' and I45 to be lifted by said springs I26 and I18 respectively. Due to the different tensions placed on said springs, said piston rod I 2I of said motor valve B will move upwardly first and close said port HI and then said piston rod I45 of said release valve C will move upwardly and open said port I. When this occurs, the pressure fluid trapped in said passageway 8i, said pipe 33, said cylinder 84 beneath said piston IOI, said pipe I83 and in said lubricator housing I85 beneath said piston I92 will be vented through-said port I, said passageway I44, said passageway I41 and said short pipe I48 to the atmosphere.

As has already been pointed out (Figures 4, 5 and 6), said passageway 18, said port 18, said bore I32, said cap II4, said pipe I42 and said bore I55 of said thimble I54 will be fllied with a predetermined pressure that is regulated by the tenslon placed on said spring I26 by said nuts I24 on said posts I08 and I08. When the clock mechanism (not shown) in said housing I12 drives said shaft I1I for-revolving said wheel I69 in a counter-clockwise direction and one of said notches I10 comes over said roller I68, the pressure in said bore I55 of said thimble I64 beneath said valve member I62 may then lift said valve member, said valve stem I63 and said lever I65,

so that said roller will enter said notch. Thus. it

will be seen that in this position, pressure fluid in said pipe I 42 is then free to flow Into said pipe I59 which leads to said T I16 connected into the cap I11 of said valve C. This pressure fluid will enter said cap I11 and act on said diaphragm I18 and move said valve stem I45 downwardly against the tension of said coil spring I19, so as to seat said conical point I46 in said seat I46 on the upper end of said bore 4 and close the same. This pressure fluid will also flow from said T I16 sageway 8 I.

2,245,003 of said valve B. The diaphragm I82 of this .valve will be acted upon by the pressure fluid entering said cap I8I and move said stem I2I' downwardly which opens said passageway I4I, whereby pressure fluid may now flow from said longitudinal passageway 19,-through said port I 4|, into said port 80 and through said longitudinal pas- The valve tip I48 of said stem I45 has already engaged its seat I48, which is the closed position of said valve C, and said pressure fluid will flow downwardly from the end of said passageway 8| through the lower end of said port 82 and into said pipe 83 through which it-is led to the lower end of said cylinder 84 beneath said piston IOI.

When said pressure fluid flows from said passageway'19 into said passageway 8!, the pressure in said chamber 4' of said cap II4 will be reduced by way of flow through said bore I32 of said stem I2I unseating saidconical tip I35. Additional pressure fluid will then flow from said pipe and maintain the pre-determined pressure desired in said cap II4, said passageway 19, said passageway 8|, said pipe 83 and cylinder 84, as Well as in said pipe I42, said pipe I59, said pipe I80 and said caps I11 and I 8I. Of course, said piston IOI will be lifted in said cylinder 84 and will carry said piston rod 91 and said clamp I03 therewith.

It will be seen in Figures 1, 2 and 3, that a pipe I83 is connected to said pipe 83, preferably adjacent said cylinder 84, and this pipe leads to an elongate lubricator or fluid injector housing or body I85. This lubricator is connected into the usual .well fluid flow line I88 which extends from the regular cross T connection I81 mounted upon the upper end of said tubing string for injecting a suitable fluid into said flow line for treating or mixing with said well fluid flowing therethrough from said tubing string, such as a chemical for treating emulsions.

A slidable, reciprocating piston rod I 88 is mounted in the lower portion of said lubricator housing I85 and this piston rod I88 has its lower end reduced, so as to form a depending pin I89 on which is mounted an annular, flat washer or ring I90 and the upper edge surface of this ring abuts the shoulder formed between said pin I89 and said piston rod I88 (Figure 33) A suitable spacer and supporting ring or collar I9I is mounted on said pin I89 below and adjacent to said washer I90, so that a suitable downturned piston cup or ring I92 may be clamped between said washer I90 and said collar I9I and make a unitary structure of said parts. The lower end of said pin I89 is screw-threaded'for receiving a nut I93 which bears against the under surface of said collar I 9| and when said nut is tightened said washer I90, said collar and said piston cup I92 are securely attached to the lower end of said piston rod I88 on said pin I89.

The upper end of said piston rod I88 is also formed with a reduced pin I94 similar to said pin I89, although much smaller in diameter. This pin I94 has a suitable spacer collar or ring I95 similar to said collar ISI for supporting a downturned packing cup I98 similar to said cup I 92. A flat washer or ring I91 similar to said washer I 90 is mounted on said pin' above said packing cup I98 and resting upon said washer I91 is an uptu ed-P cup I98 similar to said cups I92 and I98. The upper end of said pin I94 is screw-threaded to receive a nut I99 to clamp said 1 piston cups I98 and. I98, said washer I91 and said supporting collar I95 onto said reduced pin shown) I94 against the shoulder formed between said pin I94 and said piston rod I88. It will be seen in Figure 33, that the upper end of said piston rod I88 and said piston structure Just described mounted thereon, reciprocates within a cylindrical sleeve 200 which forms a cylinder for said piston structure. The lower end of said -sleeve 200 is provided with a radial flange 20I which may be clamped in a groove 202, in order to attach said sleeve 200 to said housing I and to hold said sleeve stationary. A suitable coiled spring 203 is mounted on said piston rod I88 between the flange 20I of said sleeve 200 and said washer I of said lower piston structure, so that said piston rod I 88 and its piston structures on each end move upwardly within said housing I85 against the tension of said spring 203.

Whenever pressure fluid flows through said pipe 83 into the lower end of said cylinder 84 to liftsaid wire line clamp I03, this pressure fluid will also flow through said pipe I83 into the lower end of said lubricator housing I85-beneath said piston on the lower end of said piston rod I 88. As the pressure builds up within said pipe 83, cylinder 84, pipe I83 and in the lower end of said housing I85; said piston rod I88 will be moved upwardly against the tension of said spring 203, so that when said pressure fluid is bled or vented from said pipe I83, said cylinder 84 and said pipe '83, said spring will return said piston rod to its lowermost position. A pair of suitable air holes or vents 284 are provided in said housing I85 at a point above the travel of said lower piston, so that upon the upstroke said piston does I not have to compress the air trapped thereabove,

or upon its downstroke pull a vacuum.

It will be seen in Figures 33, 34 and 35, that the cylinder sleeve 200 is spaced from the inner wall of said housing 985, so as to provide an annular space between said sleeve and the inner wall of said housing and around said sleeve. A pair of lugs or ears 205 and 208 are threaded into said housing I85, preferably diametrically opposite each other and below the upper end of said sleeve 200. The ear 205 is formed with a longitudinal passageway 201 and the outer end of said passageway terminates in an internally screw-threaded port 808 for receiving a pipe 209 that leads to a suitable source of fluid supply (not A suitable check valve 2I0 is mounted in said longitudinal passageway 201, so that fluid may flow-from said pipe 209 into said passageway 201 and the annular space between said sleeve 200 and said housing i 85, but backward flow from said annular space is prevented. Thus, said annular space and said sleeve 200 above the piston on the upper end of said rod I88 will be filled with the fluid from said pipe 209.

The car 208 also is provided with a longitudinal passageway 2! 1, similar to said passageway 201 of said ear 205, terminating in a threaded port 2I2 for receiving a pipe 2I3 which leads to said flow line I88. This passageway 2 is also provided with a check valve 214 which permits flow of fluid from said annular space through said passageway 2I I and into said pipe 2I3 for delivery to said flow line I 88. Thus, upon each upward stroke or travel of said piston rod I 88, the fluid within said sleeve 200 above said upper piston will be expelled therefrom and due to the checking action of said check valve'2I0 this fluid will be forced through said passageway 2I I, past said check valve 2I4, into said pipe 2I3.and injected into said flow line I 86. Then, upon each downstroke or travel of said piston rod, said up- 

